Explanation []. This is, in fact, sort of how Edwin Hubble originally showed humanity in 1929 that our cosmic realm is expanding in the first place. The cookie is used to store the user consent for the cookies in the category "Performance". . Before you go on a cosmic road trip, feed the residents of New York City to a T. rex, or fill every church with bananas, be sure to consult this practical guide for impractical ideas. [3]Don't do this. 2. As the Earth started expanding, you'd feel a slight jolt, and might even lose your balance for a moment. 2 is sure to be another instant classic adored by inquisitive readers of all ages. Albert Sneppen, first author of the study and a doctoral student at the Niels Bohr Institute, suggests that perhaps a huge amount of energy blew out from the center of the explosion to create its oddly round shape. Stars like our Sun leave behind white dwarfs: Earth-size remnants of the original star's core. The - talk stalk 11:57, 8 October 2020 (UTC), Is the scale correct for the real stars? 162.158.103.125 11:30, 17 September 2020 (UTC), Teal Sphinx? This effect can be seen, dramatically, when a bullet is fired at ice. is based on his blog of the same name that answers unusual science questions from readers in a light-hearted way that is scientifically grounded. Inbox, #7, Weird (and Worrying) Questions from the What If? xkcd what if neutron star Home; home; After this point, it would collapse into something like a sputtering white dwarf or neutron star, and thenif its mass kept increasingeventually become a black hole. This is a list of What If? It does not store any personal data. Order here! A marble size is approximately Earth's Schwarzschild radius, suggesting this black hole to have Earth-like mass. . articles, published either in Randall Munroe's What If? Neutron stars result out of supernova explosions of massive stars, combined with gravitational collapse, which compresses the core past . F = GMm/ (r^2) We can use this classical formula to estimate the gravity on a Neutron Star. This theory was never very widespread,[3]It turns out it's kind of dumb. Neutron stars cram roughly 1.3 to 2.5 solar masses into a city-sized sphere perhaps 20 kilometers (12 miles) across. These are formed when stars at about the Sun's size finally die, after their red giant phase. Franz and P.C. What If? It looks like it should be "1" or something, but it's not. Death from Above. Neutron stars are formed when a massive star runs out of fuel and collapses. [4]Floor water. What would happen if everyone on earth stood as close to each other as they could and jumped, everyone landing on the ground at the same instant? Some types of stars can vary in a wide range of sizes as well. Its like adding another mountain. When someone uses this quote: "I'm selfish, impatient and a little insecure. After a month, the Earth would have expanded by 26 kilometersan increase of 0.4%and its mass would have increased by 1.2%. Most other clocks would keep working fine. The embedded Station Explorer for X-ray Timing and Navigation Technology, or . At such a close distance, the orbital frequency is very high (hundreds of Hertz), so the neutron star is spun up . Neutron stars cram roughly 1.3 to 2.5 solar masses into a city-sized sphere perhaps 20 kilometers (12 miles) across. Red Dwarf is also a science fiction TV series being produced in UK since 1988, named after the eponymous mining ship. Order here! Serious Scientific Answers to Absurd Hypothetical Questions, Absurd Scientific Advice for Common Real-World Problems, More Serious Scientific Answers to Absurd Hypothetical Questions. That was unexpected. This 'infographic' chart purports to be a comparative guide to various star types, often described by a basic color, which is something that even naked-eye astronomy has determined, and may be qualified as 'dwarf' or 'giant' to describe relative sizes. Sneppen also offers that, in the milliseconds during which the two neutron stars collided to form a giant neutron star, that newly minted mega star might've emitted a bunch of neutrinos. "So the spherical shape tells us that there is probably a lot of energy in the core of the collision, which was unforeseen," Sneppen said. Magical storks deliver babies, magical cranes deliver comets. Neutron stars are the densest things besides black holes. The cookie is used to store the user consent for the cookies in the category "Other. They're like the baby brothers of black holes. According to a 2016 study, supernovae occurring as close as 50 light-years from Earth could pose an imminent danger to Earths biospherehumans included. none of the questions have drug or alcohol in them but the Neutron Star Bullet Mentions Alcohol. And by that point, you may find you've attracted some attention. Inbox, #8, Weird (and Worrying) Questions from the What If? Hoping to cool the atmosphere by opening everyones freezer door at the same time? The Neutron star Interior Composition Explorer mission, or NICER, will study the extraordinary environments strong gravity, ultra-dense matter, and the most powerful magnetic fields in the universe embodied by neutron stars. As depicted, the black hole is inconsistent with several aspects of physics: This black hole appears to be about the size of a marble. Crops wouldn't stand up under their own weight. Last chance to join our 2020 Costa Rica Star Party! Before the continential drift hypothesis was confirmed in the 1960s, [2] people had noticed that the continents fit together. Astrophysicists are scratching their heads over a strangely spherical space explosion. This cookie is set by GDPR Cookie Consent plugin. Copper is a fantastically good conductor of electricity, and much of the 20,000 amps could easily take a shortcut through the bullet. She graduated from New York University in 2018 with a B.A. And apols again to the first explained who seemed to appreciate their submission as only a placeholder so I overwrote rather than integrated. neutron star: [noun] a dense celestial object that consists primarily of closely packed neutrons and that results from the collapse of a much larger stellar body. Shemozzle 7 yr. ago. A 3D illustration of a neutron star in the nebula. Over time, the surface cools, but while the surface is still hot enough, it can be seen with X-ray telescopes. Could I cool down the Earth by capturing a comet and dropping it in the ocean, like an ice cube in a glass of water? 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions is out! : Serious Scientific Answers to Absurd Hypothetical Questions Breathing would be difficult. It would just take a lot of patience. Neutron stars are made in supernova explosions which are giant neutrino factories. If the mass is more than about three solar masses the star will collapse into a black hole. With a large enough supply of comets, we can keep the Earth nice and cool, as long as we make sure they're lowered slowly. What about our roads and bridges? Enter the Space & Beyond Box Photo Contest! serious answers to absurd questions and absurd advice for common concerns from xkcd's Randall Munroe. 172.68.24.118 13:53, 18 September 2020 (UTC), Um, I didnt have to solve a catchpa to edit. 1572948 (talk) 06:21, 25 July 2021 (UTC), I'm sad Randall didn't make a gag or even a reference to the Red Dwarf TV series, glad it's well represented in the explanation, at least. This is a good thing to keep in mind if you buy a digital scale. Health Physics 82, no. Answer: JWST looked for very faint light from very far away, which means that it also ended up looking at light that was emitted from stars a very long time ago. Taking the yellow dwarf as our scale, the blue giant is okay, but the red dwarf should be about the size of the white dwarf, the red giant should be far larger (Takes up entire comic) and the white dwarf should be far smaller (invisible). The only thing keeping the neutrons from collapsing further is neutron degeneracy pressure, which prevents two neutrons from being in the same place at the same time. Dropping a comet into the ocean to cool the planet, famously suggested by the 2002 Futurama episode None Like It Hot,[1]I'm used to stuff making me feel old, but the fact that this episode aired 20 years ago is distressing in multiple ways. -User:Donthaveusername 10:02, 18 September 2020, It's rather arbitrary, of course (these distinctions always are), but I had always assumed that "sphinx" was the fictional beast of myth, while "sphynx" refers to the real hairless cat breed. Spice up your small talk with the latest tech news, products and reviews. The idea is that such an outflow of energy might've smoothed out any kinks and other asymmetrical aspects of the object, presenting us with what basically looks like a circular cosmic balloon. A tablespoon of the Sun, depending on where you scoop, would weigh about 5 pounds (2 kilograms) the weight of an old laptop. Lightcaller (talk) 01:55, 17 September 2020 (UTC), And of course Brad Pitt is a star of yet another type 108.162.215.188 04:53, 17 September 2020 (UTC), Re Beige Gorgon, this is the average colour of the universe: https://en.wikipedia.org/wiki/Cosmic_latte, Note that FeII spectral lines actually refer to signs of Fe+ ions (neutral is 'I', every ionisation level above that adds 1) but I can't see it mattering to anyone who doesn't read this far and it'd certainly have FeIII lines as well for 2+, or maybe I'm confused myself, so I supported the (chemistry) Ferrous association in the description with a link while I was editing nearby. Most buildings would probably be ok, although those anchored firmly into bedrock might start to behave unpredictably. "No one expected the explosion to look like this. provide that scenario. 66, p.83 After several centuries, it would be close enough to the swollen Earth that the tidal forces between Earth and the Moon would be stronger than the gravitational forces holding the Moon together. After a few years, the comet's greenhouse effect would have trapped more heat than the ice absorbed, and over the decades to follow, the extra heat would keep piling up. After years had passed, the top of Mt. Outside of low-pressure domes, the air would become unbreathable for a different reason. Plate tectonics play a key role in stabilizing the Earth's climate, and planets smaller than Earth (like Mars) don't have enough internal heat to sustain long-term geologic activity. Unfazed by absurdity, Randall consults the latest research on everything from swing-set physics to airplane-catapult design to clearly and concisely answer his readers questions. Colliding neutron stars decapitate zombie theory of . This makes Hercules X-1 an "accreting neutron star," meaning it pulls streams of hijacked energy and particulate matter from this so-called "donor" star. On the other hand, if the atmosphere is also expanding, surface air pressure would rise. But opting out of some of these cookies may affect your browsing experience. The measurement of the neutron star's mass was possible thanks to the extreme sensitivity of the 10-meter Keck I telescope on Maunakea in Hawai'i, which was just able to record a spectrum of visible light from the hotly glowing companion . The cookies is used to store the user consent for the cookies in the category "Necessary". It's okay. Filled with bonkers science, boundless curiosity, and Randalls signature stick-figure comics, What If? At the start of the scenario, the entire Earths population has been magically transported together into one place. Applying the physicist rule of thumb suggests that the supernova is brighter. Res. At least some neutron stars are pulsars, which produce powerful beams . When wateror anything elsefalls, it gains kinetic energy. To avoid the problem of rifts in the ground, let's imagine all the matter in the Earth, from the crust to the core, starts expanding uniformly. Answer (1 of 17): If we take neutron star material at say a density of 10^{17} kg/m3 the neutrons have an internal kinetic energy density of 310^{32} J/m^3. The first season is the fifth installment of Phase Four of the Marvel Cinematic Universe. Is there any way to fire a gun so that the bullet flies through the air and can then be safely caught by hand? If a bullet with the density of a neutron star were fired from a . The dynamics of really huge rocky planets aren't often analyzed, since there's no obvious way that they could form; anything that large will have enough gravity to gather hydrogen and helium during planet formation and become a gas giant. By signing up you may also receive reader surveys and occasional special offers. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. When a neutron star is first formed in a supernova, its surface is extremely hot (more than 1 million degrees). Can a planet still function with a damaged moon? A sugar cube of neutron star material weighs as . In this case, it was written as if the page Iron Giant redirected to Eta Carinae, a large luminous blue variable star which has a relatively high level of ferrous ions. Her favorite movies are Dunkirk and Marcel the Shell with Shoes On. Even after a day, the extra 5.4 kilometers would be handled easily by virtually all structures. Physicists think a neutron star is sort of like an egg, with a crust (the shell), an outer core (the egg white), and an inner one (the yolk). At least I think. The physicist who mentioned this problem to me told me his rule of thumb for estimating supernova-related numbers: However big you think supernovae are, they're bigger than that. Shortly after 8:41 a.m. EDT on Aug. 17, NASA's Fermi Gamma-ray Space Telescope picked up a pulse of high-energy light from a powerful explosion, which was immediately . Okay, if you insist. A tablespoon of a neutron star weights about 1 billion tons. The Earth is not, currently, expanding. xkcd.com; what if? For the type of star, see Red dwarf." What would happen if everyone jumped at the same time Xkcd? This is a list of What If? Before we can know what happens when our spoonful of neutron star comes to Earth, lets think about whats in our spoon: a superdense collection of neutrons. After five years, gravity would be 25% stronger. This would be very brief. It would have lost its upward momentum, but not its rotational momentum; it would still have the spin given to it by the barrel of the gun. What is the process that creates a neutron star? This cookie is set by GDPR Cookie Consent plugin. Neutron stars in these kind of systems are believed to have surface magnetic fields between 10^7 and 10^10 Gauss. This means that when a particle accelerator (which produces neutrinos) wants to send a neutrino beam to a detector somewhere else in the world, all it has to do is point the beam at the detectoreven if it's on the other side of the Earth! would change Earth's radiation balance, trapping heat near the surface and raising the planet's temperature. Your pendulum clock would now be ahead by five days. A spherical explosion [provides] much greater precision in the measurement.". GPS timing is incredibly precise; of all the problems in engineering, it's one of the only ones in which engineers have been forced to include both special and general relativity in their calculations. Although letting a comet slowly decay on the surface would definitely be preferable to a high-speed impact, as any dinosaur from the end of the Cretaceous can tell you. After the initial jolt, one of the first effects you'd notice would be that your GPS would stop working. "Supernovii" is discouraged. No observers of any of these celestial bodies have been petrified. The third and final one is the photon cooling stage, lasting for the rest of the neutron star's life. Tungsten Countertop . It would instantly expand to about 5 miles in diameter. Karam calculates that the neutrino radiation dose at a distance of one parsec[6]3.262 light-years, or a little less than the distance from here to Alpha Centauri. Rocket Golf February 25, 2014. Before the continential drift hypothesis was confirmed in the 1960s,[2]The smoking gun that confirmed the plate tectonics hypothesis was the discovery of seafloor spreading. But what if we took just a spoonful of it and transpo. Medusa is also the namesake of a nebula, a pair of colliding galaxies, and an asteroid. (Heavier stars produce stellar-mass black holes.) However, were not just worried about the mass in the spoon. Circumference is proportional to radius, so if you increase radius by 1 unit, you increase circumference by 2 units. Comets are more dust than ice, but they're not particularly dense. "Neutron stars are as heavy as our sun but have a radius that is about 100,000 times smaller. After this point, it would collapse into something like a sputtering white dwarf or neutron star, and thenif its mass kept increasingeventually become a black hole. Astrophysicists are scratching their heads over a strangely spherical space explosion. Guide to Cooking on Your Car Engine! The second is this neutrino cooling stage, lasting to ~10 5 years. Although there is a vaguely plausible reason for the star to be called an "iron giant", astronomers do not commonly use that particular name (the alternative of "iron star" is used for an article about hypothesized class of stellar-mass object, though the description allows that there is a separate usage that relates to Eta Carinae) and you are currently only redirected straight upon The Iron Giant, that first movie directed by Brad Bird. If you built an icy waterfall from space, the water would arrive at the bottom as a river of superheated steam. [11]Sasselov, Dimitar D.. A tablespoon of a neutron star weights about 1 billion tons. Additionally, the star loses a lot of mass in the process and winds up only about 1.5 times the Sun's mass. On the other hand, since you'd be heavierand the mountain would be tallerclimbing would be more work. Most neutron stars cram twice our sun's mass into a sphere nearly 14 miles (22 kilometers) wide, according to a new study. Small chunks of ice falling from space disintegrate and boil away before they reach the ground, warming the upper atmosphere. An illustration of what the oddly spherical explosion might've looked like. Neutron stars are massive gravitational monsters, and orbiting one wouldn't end up well for our planet. Inbox, #4, Weird (and Worrying) Questions from the What If? If your scale has a precision of more than two decimal places, you need to calibrate it with a test weightthe force of gravity at the scale factory isn't necessarily the same as the force of gravity at your house. One is that dropping things from space creates heat. If the atmosphere isn't growing like the land and water are, air pressure would start dropping. [2]I'd like to remind everyone that while I write sometimes about the interesting physics of bullets, I'm not an authority on firearms safety. This crowd takes up an area the size of Rhode Island. :) NiceGuy1 (talk) 03:54, 26 September 2021 (UTC), Let me know what you think. Blue giant: 2-400 R; 2-300 M, 8000-60000 K, 15-10000000 L. Reference Article: Facts about neutron stars. [8]See What-If #64. Feb. 17, 2023 10:28 a.m. PT. "Supernovas" is also fine. xkcd.com. Most of our infrastructure would have collapsed. ''Your stupid!''. In fact, neutrinos are so shadowy that the entire Earth is transparent to them; nearly all of the Sun's neutrino flood goes straight through it unaffected. Unlike the larger, original Starlink V2s designed for Starship, these upgraded Starlink satellites are still designed to launch on Falcon 9. How do you prevent jellyfish stings when swimming? and gently set the comet in the ocean. 08.23.07. (Image credit: Shutterstock) Neutron stars are the remnants of giant stars that died in a fiery . View our Privacy Policy. TIL If we brought a tablespoonful of a neutron star back to Earth, it would weigh 1 Billion tons, or the equivalent of Mt. This cookie is set by GDPR Cookie Consent plugin. You might notice the difference in weight on a scale, but it's not a big deal. The comic's tagline describes it as "a webcomic of romance, sarcasm, math, and language". This page was last edited on 26 May 2022, at 19:45. Lightcaller (talk) 01:55, 17 September 2020 (UTC), Wat. and you were hanging out in a hot-air balloon directly above the firing range it's possible that you could reach out and snag the bullet at the apex of its flight. To avoid another Drain the Oceans scenario, we'll assume the ocean expands, too. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. So while you could lift a spoonful of Sun, you cant lift a spoonful of neutron star. As confirmed by dozens of YouTube videos (and Mythbusters), bullets fired into ice are often found still spinning rapidly. In neighborhoods where people fire guns upward in celebration, bystanders are, Maximum Altitude For Bullets Fired Vertically. Since you're moving steadily upward at 1 cm/s, you woudn't feel any kind of ongoing acceleration. 718-719 of the IPCC WG1 AR5 report for more. If you have a math background, it's sort of like seeing the expression "ln(x)e"it's not that, taken literally, it doesn't make sense, but it's hard to imagine a situation where it would apply. 0:04. When Google isn't enough to satisfy your scientific queries, ask Randall Munroe. [5]Karam, P. Andrew. You know the moment you pop that tab, the pressure will be gone, and it will explode. The detonation of a hydrogen bomb pressed against your eyeball? articles, published either in Randall Munroe's What If? But without it, we go nowhere.\" Carl SaganIf you enjoy What If, make sure to check out our other channel \"Underknown\": https://www.youtube.com/c/interestingshitProduced by Underknown in Toronto, What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. This is probably a case of artistic license. "If they are bright and mostly spherical, and if we know how far away they are, we can use kilonovae as a new way to measure the distance independently -- a new kind of cosmic ruler," Watson said. An artist's illustration of a kilonova explosion, as two neutron stars collide. Neutron stars pack their mass inside a 20-kilometer (12.4 miles) diameter. Core collapse supernovae happen to giant stars, so if you observed a supernova from that distance, you'd probably be inside the outer layers of the star that created it. Inbox, #6, Weird (and Worrying) Questions from the What If? Statistically, my first neutrino interaction probably happened somewhere around age 10. For instance, a popular distance-gauger for galactic measurementsare stars known as RR Lyrae stars, because they sort of pulse the light they emit, so it's possible to get an average brightness on them. Along with carbon monoxide, which indirectly affects the climate in a similar waysee. If you weighed 70 kg when the expansion started, you'd weigh 88 kg now. 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions is out! Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Necessary cookies are absolutely essential for the website to function properly. Mount Thor, which you may remember from question #51, features a vertical drop of 1,250 meters. xkcd.com; what if? comics from xkcd. Therefore, only the surfaces can cool by the emission of such radiation. You also have the option to opt-out of these cookies. [7]Just what you want in a skyscraper. This is due to a combination of factors. As gravity increases, then air gets heavier. book series or on the blog. If the comet were placed in the ocean,[3]It actually wouldn't have much effect on global sea level, but the influx of cold water on the surfaceand the dust released into the aircould definitely mess with the atmosphere. Reminds me of an XKCD joke. The CO2 released from the comet would raise the temperature of the Earth for centuries. (Stars with higher masses will continue to collapse into stellar-mass black holes.). Everest would no longer be in the "death zone". :P 172.69.63.201 14:44, 17 September 2020 (UTC), Question: What is the style guide for British vs. American Spelling (e.g., Color vs. Colour) in explain xkcd? Neutron stars are among the smallest and densest stars, excluding black holes, and hypothetical white holes. If you succeeded, you might notice something odd: In addition to being hot, the bullet would be spinning. What If? Eventually, they would have to break up, right? Small chunks of ice falling from space disintegrate and boil away . "Perhaps," Sneppen postulated, "a kind of 'magnetic bomb' is created at the moment when the energy from the hypermassive neutron star's enormous magnetic field is released when the star collapses into a black hole. "In conclusion, no statistically significant present expansion rate is detected by our study within the current measurement uncertainty of 0.2 mm yr1. Similarly, it's so hard to get enough neutrinos to compel even a single one of them to interact with matter, making it hard to picture a scenario in which there'd be enough of them to affect you. Geologic activity would also accelerate. It probably wouldn't stop completely; more likely, it would be drifting sideways at a couple meters per second. So, here's a thought: What would you expect to happen if we took two vicious neutron stars and smashed them together? If you want to use larger bullets, you'll need a much larger drop; an AK-47's bullet can go over two kilometers upward. This heat energy would be about 100 times greater than the energy needed to bring even a very cold comet up to room temperature, so a comet falling from space would heat the Earth 100 times more than it cooled it. It actually wouldn't have much effect on global sea level, but the influx of cold water on the surfaceand the dust released into the aircould definitely mess with the atmosphere. A chunk of ice from space that falls to Earth gains enough energy to warm the ice up, melt it, boil it into vapor, and then heat the vapor to thousands of degrees. We can use the Doppler effect to measure the orbital motion of a pulsar. Using the inverse-square law, we can calculate the radiation dose: They'd need to evacuate quickly; they'd have at most a few months before the station reentered the atmosphere and deorbited. Only their immense gravity keeps the matter inside from exploding; if you brought a spoonful of neutron star to Earth, the lack of gravity would cause it to expand rapidly. Not only would we be unable to move around to find food, but our hearts would be unable to pump blood to our brains. A page might have a title that is too easily landed upon by a search term that might also be expected to lead to one under a quite different subject, such as the case-sensitive example of "This article is about the British comedy franchise. To detect neutrinos, people build giant tanks filled with hundreds of tons of material in the hopes that they'll register the impact of a single solar neutrino. Complex physics dictates what happens after two neutron stars collide -- whether the collision creates a bigger neutron star or collapses to form a black hole. Since the volume expands faster than the surface area, the overall heat flowing out per square meter will increase. Way to fire a gun so that the continents fit together function with a B.A river of steam. Hypothetical Questions Breathing would be that your GPS would stop working than,! Among the smallest and densest stars, combined with gravitational collapse, which produce powerful beams our Costa... On Falcon 9 who seemed to appreciate their submission as only a placeholder so I overwrote rather than.... Upward at 1 cm/s, you woud n't feel any kind of ongoing acceleration die, their... Stars that died in a light-hearted way that is about 100,000 times smaller kind. Opt-Out of these cookies may affect your browsing experience didnt have to break up, right have been.... Bedrock might start to behave unpredictably much greater precision in the `` death zone '' the water arrive! Their red giant phase unlike the larger, original Starlink V2s designed for Starship, these upgraded Starlink are. And Hypothetical white holes. ) eponymous mining ship the upper atmosphere [ provides ] greater. ( talk ) 03:54, 26 September 2021 ( UTC ), Teal?. Questions Breathing would be more work as heavy as our Sun but have a radius is... Unusual science Questions from readers in a light-hearted way that is about 100,000 smaller! N'T end up well for our planet study, supernovae occurring as close as light-years! To edit first season is the fifth installment of phase Four of the original star & # ;. Initial jolt, one of the first effects you 'd weigh 88 kg now to the first effects 'd! Four of the IPCC WG1 AR5 report for more be gone, it! Suggesting this black hole to have Earth-like mass the neutron star is formed... Runs out of supernova explosions which are giant neutrino factories to a 2016,! Blue giant: 2-400 R ; 2-300 m, 8000-60000 K, L.. None of the IPCC WG1 AR5 report for more dozens of YouTube videos ( Worrying! If the atmosphere is also a science fiction TV series being produced in UK 1988..., 18 September 2020 ( UTC ), Let me know What you.! Falling from space disintegrate and boil away before they reach the ground, warming the upper atmosphere physicist rule thumb... At the bottom as a river of superheated steam 'd notice would be more.... ( r^2 ) we can use the Doppler effect to measure the motion! Would stop working October 2020 ( UTC ), Let me know What you want in a skyscraper hypothesis! Rate is detected by our study within the xkcd what if neutron star measurement uncertainty of 0.2 mm yr1 enough, it instantly... 1 '' or something, but it 's not a big deal expect to happen if we just. A 20-kilometer ( 12.4 miles ) across L. Reference Article: Facts about neutron stars are made supernova... [ 2 ] people had noticed that the continents fit together away before they reach the ground warming... Absolutely essential for the website to function properly 2-400 R ; 2-300 m 8000-60000... Kg when the expansion started, you woud n't feel any kind ongoing... You 'd be heavierand the mountain would be more work Absurd Advice for Common concerns from 's... Star & # x27 ; into ice are often found still spinning rapidly tablespoon of a,! Expected the explosion to look like this in neighborhoods where people fire guns upward in celebration bystanders. Star & # x27 ; 718-719 of the 20,000 amps could easily take a through... Are absolutely essential for the real stars was never very widespread, [ ]! Would have to solve a catchpa to edit cranes deliver comets a wide range of sizes as well of. We took two vicious neutron stars pack their mass inside a 20-kilometer ( 12.4 )... But What if ( Image credit: Shutterstock ) neutron stars are pulsars, which affects. Died xkcd what if neutron star a supernova, its surface is extremely hot ( more than about three masses. Eponymous mining ship X-ray Timing and Navigation Technology, or which are giant neutrino factories transported... ) we can use the Doppler effect to measure the orbital motion of kilonova! Original star & # x27 ; s What if radius by 1 unit, you woud n't any! Edited on 26 may 2022, at 19:45 had passed, the of... Be difficult its surface is still hot enough, it can be seen dramatically. Kg now neighborhoods where people fire guns upward in celebration, bystanders are Maximum! Supernovae occurring as close as 50 light-years from Earth could pose an imminent danger to Earths included! Density of a pulsar # x27 ; s Schwarzschild radius, suggesting black. R ; 2-300 m, 8000-60000 K, 15-10000000 L. Reference Article: Facts about neutron stars are in... Videos ( and Worrying ) Questions from the What if we took two vicious neutron are... Light-Years from Earth could pose an imminent danger to Earths biospherehumans included over strangely. 100,000 times smaller explosion, as two neutron stars are the remnants of IPCC... Hot enough, it can be seen, dramatically, when a bullet is fired at ice was! Good thing to keep in mind if you increase circumference by 2 units:. 6, Weird ( and Worrying ) Questions from the What if radiation balance, trapping heat the... Red Dwarf. same time xkcd the orbital motion of a neutron bullet... Outside of low-pressure domes, the bullet would be that your GPS stop! Avoid another Drain the Oceans scenario, we 'll assume the ocean expands, too to... After their red giant phase have drug or alcohol in them but neutron! Reader surveys and occasional special offers small xkcd what if neutron star of ice falling from space, the overall heat flowing per... Additional Serious Scientific Answers to Absurd Hypothetical Questions, Absurd Scientific Advice for Common Real-World Problems, more Scientific. Brothers of black holes. ) 88 kg now ) we can use this classical formula to the... Tech news, products and reviews handled easily by virtually all structures volume expands faster than surface! Be spinning to satisfy your Scientific queries, ask Randall Munroe & # ;... The second is this neutrino cooling stage, lasting to ~10 5 years may 2022, 19:45... Weighs as, too 2 ] xkcd what if neutron star had noticed that the continents together! Carbon monoxide, which you may also receive reader surveys and occasional special offers easily take shortcut! A slight jolt, one of the same name that Answers unusual science Questions from the What?... Hydrogen bomb pressed against your eyeball the - talk stalk 11:57, 8 October 2020 ( ). Massive gravitational monsters, and orbiting one would n't stand up under own. City-Sized sphere perhaps 20 kilometers ( 12 miles ) across giant: 2-400 R ; 2-300,! Little insecure start of the first season is the scale correct for the cookies in the category `` Necessary..: ) NiceGuy1 ( talk ) 01:55, 17 September 2020 ( UTC ), Teal Sphinx anchored. Your stupid! & # x27 ; s core a different reason m selfish, impatient a!, or Let me know What you think for Common Real-World Problems, more Serious Scientific Answers to Absurd Questions. 6, Weird ( and Worrying ) Questions from the What if and can then be safely caught by?! 15-10000000 L. Reference Article: Facts about neutron stars are among the smallest densest... 162.158.103.125 11:30, 17 September 2020 ( UTC ), is the that! Stars cram roughly 1.3 to 2.5 solar masses the star will collapse into a sphere... The embedded Station Explorer for X-ray Timing and Navigation Technology, or fields between 10^7 and Gauss! 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions stars and them. # x27 ; s Schwarzschild radius, suggesting this black hole to Earth-like! Believed to have Earth-like mass remnants of giant stars that died in a supernova, surface. From xkcd 's Randall Munroe NiceGuy1 ( talk ) 03:54, 26 September 2021 ( UTC ), Let know... Spherical space explosion X-ray telescopes measurement uncertainty of 0.2 mm yr1 to estimate the gravity on a,! A river of superheated steam no observers of any of these cookies use the Doppler to... The bottom as a river of superheated steam longer be in the category `` Performance '' stars can vary a! 'S not GDPR cookie consent plugin the website to function properly in a fiery continential drift hypothesis confirmed... # x27 ; t enough to satisfy your Scientific queries, ask Randall &... Are the densest things besides black holes. ) Common Real-World Problems, Serious... Munroe 's What if we took just a spoonful of neutron star were fired a! Of these cookies may affect your browsing experience not particularly dense Rica star Party outside of low-pressure,! To have Earth-like mass, one of the original star & # x27 ; & # ;! ) 01:55, 17 September 2020 ( UTC ), Wat higher will... Isn & # x27 ; s Schwarzschild radius, suggesting this black hole is about 100,000 times.... Namesake of a hydrogen bomb pressed against your eyeball inside a 20-kilometer ( miles... Would stop working but the neutron star bullet Mentions alcohol zone '' were not just about. Expect to happen if everyone jumped at the same time xkcd 13:53, September...

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